Why is trickle-down economics still with us?

Ever since Reagan and Thatcher first tried them, trickle-down policies have exploded budget deficits and widened inequality. At best, they've temporarily increased consumer demand (the opposite of what's needed during high inflation that Britain and much of the world are experiencing). 

Reagan's tax cuts and deregulation at the start of the 1980s were not responsible for America's rapid growth through the late 1980s. His exorbitant spending (mostly on national defense) fueled a temporary boom that ended in a fierce recession. The Donald Trump White House's tax cut never trickled down…

https://www.theguardian.com/commentisfree/2022/oct/09/why-is-trickle-down-economics-still-with-us